It's not just SE Asia:Central America is under harsh heat:
Honduras
41.4C Choluteca, station monthly record,0.6C from national record for May
Nicaragua
40.2C Chinandega
Costa Rica
39.2C Barco Quebrado. Record High Tmin 28.6C
Panama
38.1C Guarumal Tmin of 28.0C Los Santos
https://nitter.moomoo.me/extremetemps/status/1654929474125717504#m